CVE-2024-28537
📋 TL;DR
This CVE describes a stack overflow vulnerability in Tenda AC18 routers that allows remote attackers to execute arbitrary code or cause denial of service. The vulnerability exists in the fromNatStaticSetting function's page parameter handling. Users with Tenda AC18 routers running vulnerable firmware are affected.
💻 Affected Systems
- Tenda AC18
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, network takeover, and lateral movement to connected devices.
Likely Case
Router crash/reboot causing network disruption, or limited code execution allowing attacker persistence on the device.
If Mitigated
Denial of service only if exploit attempts are blocked but overflow still triggers.
🎯 Exploit Status
Public GitHub repository contains proof-of-concept. Stack overflow vulnerabilities in embedded devices often have reliable exploitation paths.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates. 2. If update available, download and install via router web interface. 3. Reboot router after installation.
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to router web interface
Access router admin panel → System Tools → Remote Management → Disable
Network segmentation
allIsolate router management interface from untrusted networks
🧯 If You Can't Patch
- Replace router with different model/brand that receives security updates
- Place router behind firewall with strict inbound rules blocking web interface access
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under System Status or System Tools → Firmware UpgradeCheck Version:
Not applicable - check via web interfaceVerify Fix Applied:
Verify firmware version is different from V15.03.05.05 after update📡 Detection & Monitoring
Log Indicators:
- Repeated connection attempts to router web interface
- Unusual POST requests to NAT configuration endpoints
- Router crash/reboot logs
Network Indicators:
- Unusual traffic to router port 80/443 from external IPs
- HTTP requests with long parameters to /goform/NatStaticSetting
SIEM Query:
source_ip:external AND dest_ip:router_ip AND (http_uri:"/goform/NatStaticSetting" OR http_user_agent_contains:"exploit")